At @fairkom we are planning the next generation of servers offering virtual machines. While we are deploying many applications on our own #kubernetes cluster, there is still the need of VMs for development and some support services.
What is your preferred #opensource VM management tool? Proxmox, virsh, oVirt, OpenNebula or OpenStack?
It should be expandable and support various storage backends. A web GUI would be nice, but isn't that a security issue on the host?